Kohler 24VDC User manual

Brand: Kohler

Model: 24VDC

Category: Power generators

Type: User manual

This manual is also suitable for

Operation

TP-6843 1/13a

DC Generator Sets

Models:

6VSG

24VDC

36VDC

48VDC

Controller:

VSC

Engine exhaust from this product contains chemicals

known to the State of California to cause cancer, birth

defects, or other reproductive harm.

California Proposition 65

WARNING

Product Identification Information

Product identification numbers determine service

parts. Record the product identification numbers in

the spaces below immediately after unpacking the

products so that the numbers are readily available for

future reference. Record field-installed kit numbers

after installing the kits.

Generator Set Identification Numbers

Record the product identification numbers from the

generator set nameplate(s).

Model Designation ___________________________

Specification Number _________________________

Serial Number ______________________________

Controller Identification

Record the controller description from the generator

set operation manual, spec sheet, or sales invoice.

Controller Description _________________________

Engine Identification

Record the product identification information from the

engine nameplate.

Manufacturer________________________________

Model Designation ___________________________

Serial Number _______________________________

Accessory Number Accessory Description

TP-6843 1/13 Table of Contents 3

Figure 1-1

Table of Contents

Product Identification Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Safety Precautions and Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Service Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Section 1 Descriptions and Service Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.2 Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.3 Generator Set Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.4 Alternator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.5 Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.5.1 VSC Controller Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

1.6 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.6.1 Carburetor Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.6.2 OnCue® Generator Management System . . . . . . . . . . . . . . . . . 14

1.6.3 Programmable Interface Module (PIM) . . . . . . . . . . . . . . . . . . . 14

1.6.4 Communications Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

1.7 Service Views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Section 2 Generator Set Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.1 Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.2 Prestart Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

2.3 Exercising the Generator Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4 Generator Set Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4.1 Local Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4.2 Remote Starting and Stopping . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4.3 Engine Start Crank Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4.4 Engine Cooldown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.4.5 Automatic Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

2.5 Exercise. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.6 Faults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.6.1 Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.6.2 Shutdowns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

2.6.3 Resetting the Controller After a Fault Shutdown . . . . . . . . . . . . 20

Section 3 VSC Controller Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.1 VSC Generator Set Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2 Control and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.2.1 Controller Keypad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.2.2 LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3.2.3 LCD Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3.3 Controller Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.4 Battery Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.5 Changing Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.5.1 Procedure to Change Settings . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3.6 Setting the Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.6.1 Setting the Exerciser at Controller Power-up . . . . . . . . . . . . . . . 28

3.6.2 Changing the Exercise Settings . . . . . . . . . . . . . . . . . . . . . . . . . 28

3.7 VSC Controller Menus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3.8 Main Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

3.9 Overview Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.10 Engine Metering Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

3.11 Generator Metering Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.11.1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

3.12 Generator Set Information Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.13 Genset Run Time Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

3.14 Genset System Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table of Contents

4 Table of Contents TP-6843 1/13

3.14.1 System Parameters for Battery Bank Charging . . . . . . . . . . . . . 34

3.14.2 Setting the Exerciser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.14.3 Adjusting the Display Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . 36

3.15 Date and Time Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.16 Networking Information Menus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

3.16.1 Networking Status Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

3.16.2 Networking Configuration Submenu (OnCue® Password) . . . . 39

3.16.3 RBUS Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

3.16.4 Remote Devices Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

3.17 Programmable Interface Module (PIM) Status Menu . . . . . . . . . . . . . . . 42

3.18 Event Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

3.18.1 Procedure to View Event History . . . . . . . . . . . . . . . . . . . . . . . . 43

Section 4 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.1 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4.1.1 Service Schedule, 6VSG Models . . . . . . . . . . . . . . . . . . . . . . . 46

4.2 Lubrication System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.2.1 Low Oil Pressure Shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.2.2 Oil Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.2.3 Engine Oil Recommendation . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.2.4 Oil Change Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

4.2.5 Resetting the Maintenance Timer. . . . . . . . . . . . . . . . . . . . . . . . 48

4.3 Spark Plugs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

4.4 Air Cleaner Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

4.5 Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.6 Exhaust System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.7 Engine Starting Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

4.8 Storage Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.8.1 Lubricating System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.8.2 Fuel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.8.3 Cylinder Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.8.4 Exterior Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

4.8.5 Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Section 5 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.2 Fault Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.3 Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.3.1 Controller Internal Circuit Protection. . . . . . . . . . . . . . . . . . . . . . 53

5.3.2 Line Circuit Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.4 Controller Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

5.5 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Appendix A Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

TP-6843 1/13 Safety Precautions and Instructions 5

Safety Precautions and Instructions

IMPORTANT SAFETY INSTRUCTIONS

Electro-mechanical equipment, including

generator sets, transfer switches,

switchgear, and accessories, can cause

bodily harm and pose life-threatening

danger when improperly installed,

operated, or maintained. To prevent

accidents be aware of potential dangers

and act safely. Read and follow all safety

precautions and instructions. SAVE

THESE INSTRUCTIONS.

This manual has several types of

safety precautions and instructions:

Danger, Warning, Caution, and Notice.

Danger indicates the presence of a

hazard that will cause severe

personal injury, death, or

substantial property damage.

Warning indicates the presence of a

hazard that can cause severe personal

injury, death, or substantial property

damage.

Caution indicates the presence of a

hazard that will or can cause minor

personaI injury or property damage.

Notice communicates installation,

operation, or maintenance information

that is safety related but not hazard

related.

Safety decals affixed to the equipment

in prominent places alert the operator

or service technician to potential

hazards and explain how to act safely.

The decals are shown throughout this

publication to improve operator

recognition. Replace missing or

damaged decals.

Accidental Starting

Disabling the generator set.

Accidental starting can cause

severe injury or death. Before

working on the generator set or

equipment connected to the set,

disable the generator set as follows:

(1) Press the generator set

OFF/RESET button to shut down the

generator set. (2) Disconnect the

power to the battery charger, if

equipped. (3) Remove the battery

cables, negative (–) lead first.

Reconnect the negative (–) lead last

when reconnecting the battery. Follow

these precautions to prevent the

starting of the generator set by the

remote start/stop switch.

Battery

Battery electrolyte is a diluted

sulfuric acid. Battery acid can

cause severe injury or death.

Battery acid can cause blindness and

burn skin. Always wear splashproof

safety goggles, rubber gloves, and

boots when servicing the battery. Do

not open a sealed battery or mutilate

the battery case. If battery acid

splashes in the eyes or on the skin,

immediately flush the affected area for

15 minutes with large quantities of

clean water. Seek immediate medical

aid in the case of eye contact. Never

add acid to a battery after placing the

battery in service, as this may result in

hazardous spattering of battery acid.

Battery acid cleanup. Battery acid

can cause severe injury or death.

Battery acid is electrically conductive

and corrosive. Add 500 g (1 lb.) of

bicarbonate of soda (baking soda) to a

container with 4 L (1 gal.) of water and

mix the neutralizing solution. Pour the

neutralizing solution on the spilled

battery acid and continue to add the

neutralizing solution to the spilled

battery acid until all evidence of a

chemical reaction (foaming) has

ceased. Flush the resulting liquid with

water and dry the area.

DANGER

WARNING

CAUTION

NOTICE

WARNING

Accidental starting.

Can cause severe injury or death.

Disconnect the battery cables before

working on the generator set.

Remove the negative (–) lead first

when disconnecting the battery.

Reconnect the negative (–) lead last

when reconnecting the battery.

WARNING

Sulfuric acid in batteries.

Can cause severe injury or death.

Wear protective goggles and

clothing. Battery acid may cause

blindness and burn skin.

WARNING

Explosion.

Can cause severe injury or death.

Relays in the battery charger

cause arcs or sparks.

Locate the battery in a

well-ventilated area. Isolate the

battery charger from explosive

fumes.

6 Safety Precautions and Instructions TP-6843 1/13

Battery gases. Explosion can

cause severe injury or death.

Battery gases can cause an explosion.

Do not smoke or permit flames or

sparks to occur near a battery at any

time, particularly when it is charging.

Do not dispose of a battery in a fire.

To prevent burns and sparks that

could cause an explosion, avoid

touching the battery terminals with

tools or other metal objects. Remove

all jewelry before servicing the

equipment. Discharge static electricity

from your body before touching

batteries by first touching a grounded

metal surface away from the battery.

To avoid sparks, do not disturb the

battery charger connections while the

battery is charging. Always turn the

battery charger off before

disconnecting the battery connections.

Ventilate the compartments containing

batteries to prevent accumulation of

explosive gases.

Battery short circuits. Explosion

can cause severe injury or death.

Short circuits can cause bodily injury

and/or equipment damage.

Disconnect the battery before

generator set installation or

maintenance. Remove all jewelry

before servicing the equipment. Use

tools with insulated handles. Remove

the negative (–) lead first when

disconnecting the battery. Reconnect

the negative (–) lead last when

reconnecting the battery. Never

connect the negative (–) battery cable

to the positive (+) connection terminal

of the starter solenoid. Do not test the

battery condition by shorting the

terminals together.

Engine Backfire/Flash

Fire

Servicing the air cleaner. A sudden

backfire can cause severe injury or

death. Do not operate the generator

set with the air cleaner removed.

Servicing the fuel system. A flash

fire can cause severe injury or

death. Do not smoke or permit flames

or sparks near the carburetor, fuel line,

fuel filter, fuel pump, or other potential

sources of spilled fuels or fuel vapors.

Catch fuels in an approved container

when removing the fuel line or

carburetor.

Combustible materials. A fire can

cause severe injury or death.

Generator set engine fuels and fuel

vapors are flammable and explosive.

Handle these materials carefully to

minimize the risk of fire or explosion.

Equip the compartment or nearby area

with a fully charged fire extinguisher.

Select a fire extinguisher rated ABC or

BC for electrical fires or as

recommended by the local fire code or

an authorized agency. Train all

personnel on fire extinguisher

operation and fire prevention

procedures.

Exhaust System

Generator set operation. Carbon

monoxide can cause severe

nausea, fainting, or death. Carbon

monoxide is an odorless, colorless,

tasteless, nonirritating gas that can

cause death if inhaled for even a short

time. Avoid breathing exhaust fumes

when working on or near the generator

set. Never operate the generator set

inside a building. Never operate the

generator set where exhaust gas

could seep inside or be drawn into a

potentially occupied building through

windows, air intake vents, or other

openings.

Carbon monoxide detectors.

Carbon monoxide can cause severe

nausea, fainting, or death. Install

carbon monoxide detectors on each

level of any building adjacent to the

generator set. Locate the detectors to

adequately warn the building’s

occupants of the presence of carbon

monoxide. Keep the detectors

operational at all times. Periodically

test and replace the carbon monoxide

detectors according to the

manufacturer’s instructions.

Carbon monoxide symptoms.

Carbon monoxide can cause severe

nausea, fainting, or death. Carbon

monoxide is a poisonous gas present

in exhaust gases. Carbon monoxide

is an odorless, colorless, tasteless,

nonirritating gas that can cause death

if inhaled for even a short time.

Carbon monoxide poisoning

symptoms include but are not limited

to the following:

• Light-headedness, dizziness

• Physical fatigue, weakness in

joints and muscles

• Sleepiness, mental fatigue,

inability to concentrate or speak

clearly, blurred vision

• Stomachache, vomiting, nausea

If experiencing any of these symptoms

and carbon monoxide poisoning is

possible, seek fresh air immediately

and remain active. Do not sit, lie

down, or fall asleep. Alert others to

the possibility of carbon monoxide

poisoning. Seek medical attention if

the condition of affected persons does

not improve within minutes of

breathing fresh air.

WARNING

Fire.

Can cause severe injury or death.

Do not smoke or permit flames or

sparks near fuels or the fuel system.

WARNING

Carbon monoxide.

Can cause severe nausea,

fainting, or death.

The exhaust system must be

leakproof and routinely inspected.

TP-6843 1/13 Safety Precautions and Instructions 7

Fuel System

The fuel system. Explosive fuel

vapors can cause severe injury or

death. Vaporized fuels are highly

explosive. Use extreme care when

handling and storing fuels. Store fuels

in a well-ventilated area away from

spark-producing equipment and out of

the reach of children. Never add fuel

to the tank while the engine is running

because spilled fuel may ignite on

contact with hot parts or from sparks.

Do not smoke or permit flames or

sparks to occur near sources of spilled

fuel or fuel vapors. Keep the fuel lines

and connections tight and in good

condition. Do not replace flexible fuel

lines with rigid lines. Use flexible

sections to avoid fuel line breakage

caused by vibration. Do not operate

the generator set in the presence of

fuel leaks, fuel accumulation, or

sparks. Repair fuel systems before

resuming generator set operation.

Gas fuel leaks. Explosive fuel

vapors can cause severe injury or

death. Fuel leakage can cause an

explosion. Check the LP vapor gas or

natural gas fuel system for leakage by

using a soap and water solution with

the fuel system test pressurized to 6-8

ounces per square inch (10-14 inches

water column). Do not use a soap

solution containing either ammonia or

chlorine because both prevent bubble

formation. A successful test depends

on the ability of the solution to bubble.

Hazardous Noise

Engine noise. Hazardous noise can

cause hearing loss. Generator sets

not equipped with sound enclosures

can produce noise levels greater than

105 dBA. Prolonged exposure to

noise levels greater than 85 dBA can

cause permanent hearing loss. Wear

hearing protection when near an

operating generator set.

Hazardous

Voltage/Moving Parts

Grounding electrical equipment.

Hazardous voltage can cause

severe injury or death. Electrocution

is possible whenever electricity is

present. Ensure you comply with all

applicable codes and standards.

Electrically ground the generator set,

transfer switch, and related equipment

and electrical circuits. Turn off the

main circuit breakers of all power

sources before servicing the

equipment. Never contact electrical

leads or appliances when standing in

water or on wet ground because these

conditions increase the risk of

electrocution.

WARNING

Explosive fuel vapors.

Can cause severe injury or death.

Use extreme care when handling,

storing, and using fuels.

CAUTION

Hazardous noise.

Can cause hearing loss.

Never operate the generator set

without a muffler or with a faulty

exhaust system.

DANGER

Hazardous voltage.

Will cause severe injury or death.

This equipment must be installed

and serviced by qualified electrical

personnel.

WARNING

Hazardous voltage. Moving parts.

Can cause severe injury or death.

Operate the generator set only when

all guards and electrical enclosures

are in place.

WARNING

Hazardous voltage.

Backfeed to the utility system can

cause property damage, severe

injury, or death.

If the generator set is used for

standby power, install an automatic

transfer switch to prevent inadvertent

interconnection of standby and

normal sources of supply.

CAUTION

Welding the generator set.

Can cause severe electrical

equipment damage.

Never weld components of the

generator set without first

disconnecting the battery,

controller wiring harness, and

engine electronic control module

(ECM).

8 Safety Precautions and Instructions TP-6843 1/13

Welding on the generator set. Can

cause severe electrical equipment

damage. Before welding on the

generator set perform the following

steps: (1) Remove the battery cables,

negative (–) lead first. (2) Disconnect

all engine electronic control module

(ECM) connectors. (3) Disconnect all

generator set controller and voltage

regulator circuit board connectors. (4)

Disconnect the engine battery-

charging alternator connections. (5)

Attach the weld ground connection

close to the weld location.

Connecting the battery and the

battery charger. Hazardous voltage

can cause severe injury or death.

Reconnect the battery correctly,

positive to positive and negative to

negative, to avoid electrical shock and

damage to the battery charger and

battery(ies). Have a qualified

electrician install the battery(ies).

Short circuits. Hazardous

voltage/current can cause severe

injury or death. Short circuits can

cause bodily injury and/or equipment

damage. Do not contact electrical

connections with tools or jewelry while

making adjustments or repairs.

Remove all jewelry before servicing

the equipment.

Heavy Equipment

Hot Parts

Servicing the exhaust system. Hot

parts can cause severe injury or

death. Do not touch hot engine parts.

The engine and exhaust system

components become extremely hot

during operation.

Servicing the engine heater. Hot

parts can cause minor personal

injury or property damage. Install

the heater before connecting it to

power. Operating the heater before

installation can cause burns and

component damage. Disconnect

power to the heater and allow it to cool

before servicing the heater or nearby

parts.

WARNING

Unbalanced weight.

Improper lifting can cause severe

injury or death and equipment

damage.

Do not use lifting eyes.

Lift the generator set using lifting

bars inserted through the lifting holes

on the skid.

WARNING

Hot engine and exhaust system.

Can cause severe injury or death.

Do not work on the generator set

until it cools.

TP-6843 1/13 Introduction 9

Introduction

This manual provides operation and maintenance

instructions for the DC (direct current) variable speed

model 6VSG generator sets equipped with Kohler VSC

generator set controllers.

This generator set is approved for use in stationary

applications in locations served by a public utility,

photovoltaic cells, wind turbines or any combination of

power sources tied to a battery bank. Have the

generator set installed by an authorized

distributor/dealer or service technician. Refer to

Installation Manual, for installation instructions.

Information in this publication represents data

available at the time of print. Kohler Co. reserves the

right to change this publication and the products

represented without notice and without any obligation

or liability whatsoever.

Read this manual and carefully follow all procedures

and safety precautions to ensure proper equipment

operation and to avoid bodily injury. Read and follow

the Safety Precautions and Instructions section at the

beginning of this manual. Keep this manual with the

equipment for future reference.

The equipment service requirements are very

important to safe and efficient operation. Inspect the

parts often and perform required service at the

prescribed intervals. Obtain service from an

authorized service distributor/dealer to keep

equipment in top condition.

Figure 1

Figure 1 6VSG Generator Set

List of Related Literature

Figure 2 identifies related literature available for the

generator sets covered in this manual. Only trained

and qualified personnel should install or service the

generator set.

Figure 2

Figure 2 Related Literature

Literature Type Part Number

Installation Manual, Model 6VSG

Generator Set TP-6842

Service Manual, 6VSG Generator Set TP-6844

Operation Manual, OnCue

Software

TP-6796

Operation Manual, SiteTech

™

Software

TP-6701

Installation Instructions, Programmable

Interface Module (PIM) TT-1584

Parts Catalog, Model 6VSG TP-6845

10 Introduction TP-6843 1/13

Nameplate

The following illustration shows a typical generator set

nameplate. Copy the model, serial, and specification

numbers from the nameplate into the spaces provided

in the product information section on the inside front

cover of this manual. See the service views in Section

1.7 for the nameplate location.

Figure 3

Figure 3 Typical Nameplate

Emission Information

The Kohler Model CH740 engine used on the 6VSG

generator set is certified to operate using natural gas

or LPG fuel.

The Emission Compliance Period referred to on the

Emission Control or Air Index label indicates the

number of operating hours for which the engine has

been shown to meet CARB or EPA emission

requirements. Figure 4 provides the engine

compliance period (in hours) associated with the

category descriptor, which may be found on the

certification label.

Figure 4

Figure 4 Emission Compliance Period

Refer to the certification label for engine displacement.

The exhaust emission control system for the CH740

engines (6VSG) is EM for U.S. EPA, California, and

Europe. See Figure 1-2 for engine certification label

location.

GM12070

Emission Compliance Period

EPA Category C

250 hours

Category B

500 hours

Category A

1000 hours

CARB Moderate 125

hours

Intermediate

250 hours

Extended 500

hours

TP-6843 1/13 Service Assistance 11

Service Assistance

For professional advice on generator set power

requirements and conscientious service, please

contact your nearest Kohler distributor or dealer.

• Consult the Yellow Pages under the heading

Generators—Electric.

• Visit the Kohler Power Systems website at

KOHLERPower.com.

• Look at the labels and stickers on your Kohler

product or review the appropriate literature or

documents included with the product.

• Call toll free in the US and Canada 1-800-544-2444.

• Outside the US and Canada, call the nearest

regional office.

Headquarters Europe, Middle East, Africa

(EMEA)

Kohler Power Systems

3 rue de Brennus

93200 Saint Denis

France

Phone: (33) 1 49 178300

Fax: (33) 1 49 178301

Asia Pacific

Power Systems Asia Pacific Regional Office

Singapore, Republic of Singapore

Phone: (65) 6264-6422

Fax: (65) 6264-6455

China

North China Regional Office, Beijing

Phone: (86) 10 6518 7950

(86) 10 6518 7951

(86) 10 6518 7952

Fax: (86) 10 6518 7955

East China Regional Office, Shanghai

Phone: (86) 21 6288 0500

Fax: (86) 21 6288 0550

India, Bangladesh, Sri Lanka

India Regional Office

Bangalore, India

Phone: (91) 80 3366208

(91) 80 3366231

Fax: (91) 80 3315972

Japan, Korea

North Asia Regional Office

Tokyo, Japan

Phone: (813) 3440-4515

Fax: (813) 3440-2727

Latin America

Latin America Regional Office

Lakeland, Florida, USA

Phone: (863) 619-7568

Fax: (863) 701-7131

12 Service Assistance TP-6843 1/13

Notes

TP-6843 1/13 Section 1 Descriptions and Service Views 13

Section 1 Descriptions and Service Views

1.1 Introduction

The generator set specification sheets provide specific

generator and engine information. Refer to the spec

sheet for data not supplied in this manual. Consult the

generator set service manual, engine operation

manual, and engine service manual for additional

specifications. Obtain copies of the latest spec sheets,

manuals, diagrams, and drawings from your local

distributor/dealer.

1.2 Engine

The generator set has a four-cycle, twin cylinder,

air-cooled Kohler engine. The engine operates on

cleanburning natural gas or LPG fuel. Engine

features include:

• Efficient overhead valve design and full pressure

lubrication for maximum power, torque, and

reliability under all operating conditions.

• Dependable, maintenance-free electronic ignition.

• Precision-formulated cast iron construction of parts

subjected to the most wear and tear.

• Field-convertible multi-fuel systems that allow fuel

changeover from natural gas to LPG (and vice

versa) while maintaining CARB emission

certification.

• The variable-speed engine runs at 2300 rpm at no

load and 2900 rpm when supplying full load.

1.3 Generator Set Enclosure

The generator set is housed in a steel enclosure with

Power Armor powder coat paint. The enclosure has a

hinged, locking door that allows easy access to the

generator set controller when required, but locks

securely to prevent unauthorized access.

To open the door, insert the tool provided with the

enclosure and turn counterclockwise 1/2 turn.

Be sure to close and lock the enclosure, and keep the

tool in a secure location.

1.4 Alternator

The 6VSG is a direct current (DC) output machine. It

utilizes a 24-pole permanent magnet construction to

create high frequency three-phase alternating current

which is rectified to produce low-ripple DC output.

1.5 Controller

The Model 6VSG generator set comes equipped with

the VSC controller. See Figure 1-1. The controller

provides integrated control for the generator set and

the optional programmable interface module (PIM) or

optional communications kit interface board.

The controller’s two-line LCD screen displays status

messages and system settings that are clear and easy

to read in all lighting conditions, including direct

sunlight and low light.

Figure 1-1

Figure 1-1 VSC Controller

1.5.1 VSC Controller Features

• Six-button keypad

◦ OFF, AUTO, and RUN pushbuttons

◦ Select and arrow buttons for access to system

configuration and adjustment menus

• LED indicators for OFF, AUTO, and RUN modes

• LED indicators for percentage of load being output

•LCD display

◦ Two lines x 16 characters per line

KPS_048

GM77569

14 Section 1 Descriptions and Service Views TP-6843 1/13

◦ Backlit display with adjustable contrast for

excellent visibility in all lighting conditions

• Scrolling system status display

◦ Generator set status

◦ Voltage and percent load

◦ Engine temperature

◦ Oil pressure

◦ Battery voltage

◦ Engine runtime hours

• Date and time displays

• Smart engine cooldown senses engine temperature

• Digital voltage regulation: ±1.0% RMS no-load to

full-load

• Automatic start with programmed cranking cycle

• Programmable exerciser can be set to start

automatically on any future day and time, and run

every week or every two weeks

• Three exercise modes

• Front-access mini USB connector for SiteTech

™

connection

• Integral Ethernet connector for Kohler

OnCue

• Built-in 2.5 amp battery charger

• Remote two-wire start/stop capability

• Diagnostic messages

◦ Displays diagnostic messages for the engine,

generator, and programmable interface

module (PIM)

◦ Over 70 diagnostic messages can be displayed

• Maintenance reminders

• System settings

◦ System voltage and percent load

◦ Voltage adjustment

◦ Measurement system, English or metric

• Programmable Interface Module (PIM) status

displays

◦ Input status (active/inactive)

◦ Output status (active/inactive)

1.6 Accessories

The following optional accessories are offered for the

6VSG generator sets.

1.6.1 Carburetor Heater

An optional carburetor heater is recommended for

improved cold starting in locations where the ambient

temperature drops below 0°C (32°F). The carburetor

heater prevents condensation and carburetor icing.

The heater requires a continuous source of AC power.

See the generator set Installation manual for more

information.

1.6.2 OnCue

Generator Management

System

The Kohler

OnCue

Generator Management System

allows monitoring and control of your 6VSG generator

set from a personal computer located in your home or

at other remote locations. OnCue

can also be

configured to send email or text message notifications

in the event of a generator set fault.

Note: Be sure to obtain the correct version of the

OnCue

kit for the VSC controller.

OnCue

version 3.1 or higher is required for 6VSG

generator sets.

1.6.3 Programmable Interface Module

(PIM)

The optional Programmable Interface Module (PIM)

provides two programmable inputs and six

programmable dry contact outputs for connection to

customer-supplied equipment. The outputs are

controlled by the VSC controller, and can also be

controlled remotely using the OnCue

program.

The PIM is mounted in a NEMA 3R aluminum

enclosure, which can be mounted indoors or outdoors.

See the installation instructions provided with the PIM.

1.6.4 Communications Kit

The optional communications kit includes the following

factory-installed items:

• Interface board with factory-set inputs and outputs

and customer connection terminal blocks

• Fuel pressure switch

• Enclosure intrusion alarm switch

TP-6843 1/13 Section 1 Descriptions and Service Views 15

1.7 Service Views

Figure 1-2

Figure 1-2 Service View (see Figure 1-3 for optional communications kit components)

kps_002.eps

ADV-8060

1. Exhaust air outlet

2. Air cleaner

3. Oil fill

4. Oil drain

5. Oil drain valve

6. Oil filter

7. Muffler

8. Alternator air inlet

9. Customer connection blocks (located behind panel)

10. Electrical inlet access panel

11. Engine starting battery location (battery not included)

12. Lifting hole

13. Controller

14. Engine certification label

15. Load circuit breaker

16. Oil dipstick

17. Exhaust outlet

18. Fuel inlet

19. Electrical inlet

20. Battery cables (included)

21. Nameplate

16 Section 1 Descriptions and Service Views TP-6843 1/13

Figure 1-3

Figure 1-3 Optional Communications Kit Components

ComKitB

GM85956C

1. Interface board (factory-wired to terminal blocks)

2. Intrusion alarm switch

3. Interface board input and output connection terminal blocks

4. Fuel pressure switch

TP-6843 1/13 Section 2 Generator Set Operation 17

Section 2 Generator Set Operation

2.1 Theory of Operation

The generator set utilizes a permanent-magnet

alternator to produce 3-phase AC voltage. This

voltage is rectified using a full-wave 3-phase rectifier

(single block rectifier for 36V and 48V, three individual

rectifier blocks for 24V) to produce low-ripple DC

output. See Figure 2-1 and Figure 2-2.

The VSC measures the average DC voltage on the

output and lists this on the auto-scrolling display, in the

Overview menu and in the Generator metering menu.

Figure 2-1

Figure 2-1 Basic VSG Power Connections

Figure 2-2

Figure 2-2 Output Waveform, with Rectified Signal

The voltage is regulated to maintain a constant output

voltage, which is equal to the System Voltage setting.

When the load on the 6VSG generator increases, the

generator controller increases the engine speed. The

6VSG series is designed to produce rated voltage at

2300 rpm with no load and at 2900 rpm when

supplying full load. The output current and power

increase with the engine speed. The engine speed is

limited to a maximum of 2900 rpm. See

Section 3.14.1 for more information.

2.2 Prestart Checklist

To ensure continued satisfactory operation, perform

the following checks or inspections before or at each

startup, as designated, and at the intervals specified in

the service schedule. In addition, some checks

require verification after the unit starts.

Air Cleaner. Check for a clean and installed air

cleaner element to prevent unfiltered air from entering

the engine.

Air Inlets. Check for clean and unobstructed air inlets.

Battery. Check for tight battery connections. Consult

the battery manufacturer’s instructions regarding

battery care and maintenance.

Enclosure. Check that all enclosure panels and

internal baffling are in place.

KPS_105

KPS_106

18 Section 2 Generator Set Operation TP-6843 1/13

Exhaust System. Check for exhaust leaks and

blockages. Check the muffler condition.

• Inspect the exhaust system components for cracks,

leaks, and corrosion. Check for tight exhaust

system connections.

• Check for corroded or broken metal parts and

replace them as needed.

• Check that the exhaust outlet is unobstructed.

Oil Level. Check the oil level before starting the

generator set and at the intervals given in Section 4,

Scheduled Maintenance. Maintain the oil level at or

near, not over, the full mark on the dipstick.

Operating Area. Check for obstructions that could

block the flow of cooling air. Keep the air intake area

clean. Do not leave rags, tools, or debris on or near

the generator set.

2.3 Exercising the Generator Set

Operate the generator set without load once each

week or every 2 weeks for 20 minutes. See Section

2.5, Exercise. For instructions to set the exerciser, see

Section 3.6.

2.4 Generator Set Operation

2.4.1 Local Starting and Stopping

Start: Press the RUN button to immediately start the

generator set.

Stop: Press the OFF button. The engine stops.

Run the generator set with no load for at least

2 minutes to ensure adequate engine cooldown.

2.4.2 Remote Starting and Stopping

The generator set must be in automatic mode for

remote operation. Press the AUTO button on the VSC

controller.

A remote switch connected to terminals 3 and 4 can be

used to start and stop the generator set. Close the

switch to start and run the generator set. Open the

switch to stop the generator set.

Run the generator set with no load for at least

2 minutes to ensure adequate engine cooldown.

2.4.3 Engine Start Crank Cycle

The controller attempts to start the generator set three

times (three crank cycles, 15 seconds crank and

15 seconds off). If the generator set does not start in

three attempts, the system shuts down on an

overcrank fault. See Section 2.6.

Cranking 1, 2, and 3 are displayed during the crank

cycle. Pressing the OFF button during the crank cycle

stops the cranking. No other buttons are

acknowledged during the crank cycle.

2.4.4 Engine Cooldown

The engine cooldown time delay allows the engine to

run after the loads have been removed.

The engine cooldown time delay is set to 5 minutes.

The engine stops before the cooldown time delay

expires if the temperature drops below the

cooled-down temperature level, or if the temperature

rises above the high limit during the cooldown cycle.

2.4.5 Automatic Operation

The 6VSG monitors the voltage of a storage battery

bank connected to (+) and (–) of the output block to

determine charge condition of the storage battery (see

Figure 2-3).

• If the storage battery voltage falls below the

minimum voltage for more than 3 minutes, or if a

remote start command is received, the generator

set starts. A remote start command can be

activated by closing the remote start contacts

across 3 and 4 or by a start exercise command.

• When the generator set load falls below the

minimum % load for more than 3 minutes, or a

remote stop command is received, the generator set

stops. A remote stop command can be caused by

opening the remote start contacts across 3 and 4 or

by the exercise time ending.

The minimum voltage, minimum load, and time delays

are adjustable using a personal computer and Kohler

SiteTech

™

software. Contact your Kohler distributor.

TP-6843 1/13 Section 2 Generator Set Operation 19

Figure 2-3

Figure 2-3 Output Block

2.5 Exercise

The VSC controllers can be set to automatically run

the generator set at the same time and day each

week. Exercising the generator set weekly or every

two weeks is required to keep the engine and

alternator in good operating condition.

When power is applied to the VSC controller (that is,

when the battery is connected), you will be prompted

to set the date and time, and then to set the exerciser.

See Section 3.1, VSC Generator Set Controller, for

more information

An exercise can be started at any time using Kohler

OnCue

, or can start automatically according to the

exercise schedule programmed on the VSC controller.

Three exercise modes are available. During some

exercise modes the engine speed increases and

decreases. This is normal.

1. Unloaded Full Speed Exercise. The generator

regulates the output load below 5% of capacity.

The generator will stop after 20 minutes.

2. Unloaded Cycle Exercise. The generator set

engine speed varies during the 20-minute

exercise according to the following cycle:

a. The generator set regulates the output load

below 5% of capacity for 11 minutes to warm

up.

b. The output regulation is moved to the Genset

Maximum Percent Capacity for 3 minutes to

test ability to output power.

c. The load limit is returned to 5% for 6 minutes

to allow the generator to cool down before

stopping.

3. Loaded Full Speed Exercise. The generator

operates normally. Voltage is regulated to Voltage

Regulator Average Voltage Adjustment, and load

is regulated to Genset Maximum Percent

Capacity. The generator stops after 20 minutes,

regardless of the load on the generator.

2.6 Faults

The VSC controller displays fault messages for

generator set warnings and shutdowns. Selected fault

messages are shown in Figure 2-5.

2.6.1 Warnings

The controller displays a fault message but the

generator set does not shut down on a warning. The

controller resets automatically after a warning

condition is corrected.

2.6.2 Shutdowns

Under a fault shutdown condition, the generator set

shuts down automatically and the controller displays a

fault message. The OFF LED flashes. In some cases,

the engine cooldown cycle runs before the engine

shuts down. See Figure 2-5.

Shutdown switches (such as the low oil pressure

switch or high engine temperature switch) on the

generator set will automatically reset when the

problem is corrected. However, the fault condition at

the controller does not clear until the controller is reset.

The generator set cannot be restarted until the fault

condition is corrected and the controller is reset. See

Section 2.6.3 for instructions to reset the controller

after a fault shutdown.

KPS_043B

1. Positive (+)

2. Negative (–)

20 Section 2 Generator Set Operation TP-6843 1/13

2.6.3 Resetting the Controller After a

Fault Shutdown

Always identify and correct the cause of a fault

shutdown before resetting the controller. Check the

fault message displayed on the controller and refer to

Figure 2-5 to identify and correct the fault condition

before proceeding. Contact an authorized

distributor/dealer for service, if necessary.

Press the OFF button to reset the controller, or follow

the procedure below. See Figure 2-4.

1. While the fault message is displayed, press the

Select button to go to the Overview menu.

2. Press Select again. The active fault message is

displayed.

3. Press Select. Confirm Clear Fault: NO is

displayed.

4. Press the UP arrow button. Confirm Clear Fault:

YES is displayed.

5. Press the Select button to enter YES and clear

the fault.

6. Press the Select button to return to the overview

menu. The controller changes to OFF mode.

7. Press AUTO to put the generator set into

automatic mode.

Figure 2-4

Figure 2-4 Clearing a Fault on the VSC Controller

Figure 2-5

Overview ---->

1.2 h

Fault Message

tp6809

Confirm Clear

Fault: NO

Confirm Clear

Fault: YES

Fault Message

Press UP

arrow button.

Fault Message

Warning (W) or

Shutdown (SD) Condition Check

Accy PwrOver

Warning

W Accessory Power Overload. Too many devices

on the accessory power port or an over current

fault (short circuit) on the accessory controller

power output. (Feeds RBUS devices - PIM)

Contact an authorized

distributor/dealer for service.

Aux Input SD * Auxiliary input. An optional customer-connected

input is closed. (Digital input from optional PIM.)

Check customer-supplied equipment.

Batt Chg Flt W Battery charger fault. Input to PIM from an

external battery charger (not the built-in battery

charger).

Check external battery charger.

Battery Voltage

CrLow

W Engine starting battery voltage is critically low,

less than 10.5 VDC.

Check the battery rating and

condition.

Check the battery charger operation.

Charge or replace the battery.

Battery Voltage

High

W Engine starting battery voltage rises above

16 VDC for more than 10 seconds. Inhibited

during the engine crank cycle.

Clears when the battery voltage returns to an

acceptable level.

Check the battery rating and

condition.

Check the battery charger operation.

Battery Voltage

Low

W Engine starting battery voltage falls below

12.5 VDC for more than 90 seconds when the

engine is not running.

Not operative during the engine crank cycle.

Clears when the battery voltage returns to an

acceptable level.

Check the battery rating and

condition.

Check the battery charger operation.

Charge or replace the battery.

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